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The SOM96 Serial Output Module is designed to be used with IBM PCs and compatibles. Each module has 4 independent single pole changeover relays which can be independently addressed from the PC. The standard RS232 serial output is converted to RS485 by the first module and this is used to drive subsequent modules. Each module may be allocated one of 256 addresses, thus allowing for control of 1024 relays. Addresses are selected using an 8 way DIL switch and more than one module can have the same address.
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